Each class from the UML class diagram should be created in a separate .rb file.
All associations (1-to-many relationships) and aggregations (parent-child relationships) between classes should be implemented.
All properties visible in the diagram should be defined and set up in the constructor method. Exception: properties for the 1-to-many relationships should NOT be set in the constructor method. Instead, they should have a custom setter method created.
All methods visible in the diagram should be implemented:
add_item method (in all classes that have that method)
should take an instance of the Item class as an input.
should add the input item to the collection of items.
should add self as a property of the item object (by using the correct setter from the item object).
can_be_archived?() in the Item class
should return true if published_date is older than 10 years.
otherwise, it should return false.
move_to_archive() in the Item class
should reuse can_be_archived?() method.
should change the archived property to true if the result of the can_be_archived?() method is true.
should do nothing if the result of the can_be_archived?() method is false.
can_be_archived?() in the Book class
should override the method from the parent class.
should return true if parent's method returns true OR if cover_state equals to "bad".
otherwise, it should return false.
can_be_archived?() in the MusicAlbum class
should override the method from the parent class.
should return true if parent's method returns true AND if on_spotify equals true.
otherwise, it should return false.
can_be_archived?() in the Movie class
should override the method from the parent class.
should return true if parent's method returns true OR if silent equals true.
otherwise, it should return false.
can_be_archived?() in the Game class
should override the method from the parent class.
should return true if parent's method returns true AND if last_played_at is older than 2 years.
otherwise, it should return false.
Add unit tests for all implemented methods.
User interface
Create a main.rb file that will serve as your console app entry-point.
Your console app, at the start, should:
Present the user with a list of options to perform.
Let users choose an option.
If needed, ask for parameters for the option.
Have a way to quit the app.
The following options should be available:
List all books
List all music albums
List all movies
List of games
List all genres (e.g 'Comedy', 'Thriller')
List all labels (e.g. 'Gift', 'New')
List all authors (e.g. 'Stephen King')
List all sources (e.g. 'From a friend', 'Online shop')
Add a book
Add a music album
Add a movie
Add a game
All data should be preserved by saving collections in .json files.
Database
Create a schema.sql file with tables that will be analogical to the structure of the classes in your app. As you cannot implement inheritance in the database tables - add all properties and associations from the parent Item class as table columns to all tables based on the child classes. Thanks to that it can be used to store data in the future.
User interface
Database